Fog-horn for vessels



(No Modeh) 4 R CHESTER.

.Fog Horn for Vessels.

No. 235,509. P atentedDec. 14, 1880.

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N. PETERS, FHOIO-LITHOGRAPNER. WASHINGLON, D C.

-UNHED STATES PATENT @m-acn.

RICHARD CHESTER, OF CHICAGO, ILLINOIS.

FOG-HORN FOR VESSELS.

SPECIFICATION forming part of Letters Patent N 0. 235,509, dated December 14., 1880.

Application filed April 3, 1880.

, fog-horns or signals to be used upon vessels;

and it consists in the devices and their arrangement and connection together as hereinafter fully described.

In the accompanying drawings, which form a part of this specification, Figure 1 is a perspective view of my improved fog-horn. Fig. 2 is a vertical longitudinal section of the same, andFig. 3 is a detailview, somewhat enlarge l from the preceding figures, of the vibrating reed or mouth-piece of the horn.

Similar letters of reference refer to like parts throughout the several views.

In said drawings, A is the trumpet or sounder of the horn, having a bell-shaped extremity, 0., within which is placed a hollow conical disperser, a, sustained in place by suitable brace-stripsc The mouth-piece of the horn consists of a spoon-shaped extension, B, and flat reed B, made larger at the forward or free end'than-atithe other. I findby experiment that this structure of the reed gives a peculiarly penetrating tone to the sound, due perhaps to interference and overtones produced thereby The mouth-piece of the trumpet is secured, as described, together with the trumpet, upon the air-chamber C, so that the mouth-piece will project into said air-chamber. This air-chamber communicates, by means of the puppet-valve D, with two air-ducts, e 6, leading to the cylinder F, one duct entering it near each end of said cylinder. At each end of said cylinder is an ingress-valve, G G, constructed to swing open to an entering current of air, and to close against its exit. Located within the tylinder F is apiston, H, connected to a piston-rod, J, which passes out of the 'stufling-box K at the rear end of the cylinder, and its end is furnished with a hand-grasp, L, whereby the piston-rod may be worked readily. Upon the lower side of the cylinder is a socket, M,

(No model.)

adapting the entire instrument to be mounted upon the pin N, so that the whole instrument may be turned in any direction upon the pin as a pivot. This pin or trunnion may be mounted upon any part of the vessel, as desired, and will serve not only as a means of directing thehorn to any point of the compass desired,'but also as a holdfast or purchase, to enable the convenient operation of the piston by means of the handle L and the piston-rod.

Instead of providing the cylinder with a socket, M, as described, it may, as will be readily understood, be provided with a pin in place of 'a socket, in which case the socket or hole will be upon or in the vessel or its timbers.

The operation is as follows: The apparatus, being suitably mounted, as described, is turned so as to point in the direction in which the sound is'desired to be sent, and the piston is moved longitudinally in the cylinder by means of the handle L with such stroke and force as is desired, and as the piston-rod moves from one end of the cylinder the ingress-valve at that end will open and admit air to follow the piston, while the ingress-valve at the other end will close and cause the air at that end to be driven into the air-duct e or e, which will shift the puppet-valve D over, so that the air thus received into the air-duct will be driven into the chamber 0. Being in the chamber 0, and still under pressure, the air will be forced through the mouth-piece into the trumpet, causing the reed to vibrate with a loud singular tone. The sound passing from the mouthpiece enters the trumpet, and a portion of it, passing straight through the open end of the conical disperser, will proceed straight ahead, wherever the trumpet is aimed. The other portion of it will strike against the conical exterior of the disperser a, and will be dispersed in all directions. The apparatus is of course not dependent upon the strength of lungs of the operator, as an ordinary fog-horn is, while at the same time it has nearly the same portability and ease of directing to different points of the compass as the ordinary lung-blown instrument.

Having now fully described my invention, what I claim is 1. The trumpet A, supported by and projecting into the cylindrical chamber 0, in combination with the chamber (,7, cylinder 1, to which the said chamber is secured, piston H, air-ducts ee, connecting the chamber with the cylinder, ingress-valves G G, and puppetvalve D, substantially as and for the purpose specified.

2. The combination of the trumpet A, provided with a conical sound-disperser, a, bell a, and spoon-shaped mouth-piece B, projecting 

